#366CA7
Closest named color: French Blue (#436BAD). oklch(52.3% 0.11 252.4), rgb(54, 108, 167).
Aa
White text reads best on this color (5.44:1).
About this color
#366CA7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.110 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.017 away. White text reads best on it, at 5.44:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.85:1 |
| White text | 5.44:1 |
Values
| HEX | #366CA7 |
| RGB | rgb(54, 108, 167) |
| HSL | hsl(211, 51%, 43%) |
| OKLCH | oklch(52.3% 0.11 252.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #366CA7 | 5.44:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #366CA7 | 3.85:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #366CA7 text on white | 5.44:1 | AA | Lc 76.9 | Fine for body text |
| #366CA7 text on black | 3.85:1 | AA large text | Lc -24.9 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBED
oklch(88.6% 0.03 253)
-
Step 300
300
#A9C3E3
oklch(80.8% 0.054 253.8)
-
Step 400
400
#7AA4D5
oklch(70.7% 0.086 252.8)
-
Step 500
500
#578DC9
oklch(63.2% 0.108 252.2)
-
Step 600
600
#3B76B6
oklch(55.7% 0.118 252.3)
-
Step 700
700 (this color)
#366CA7
oklch(52.3% 0.11 252.4)
-
Step 800
800
#26517F
oklch(42.8% 0.09 252.1)
-
Step 900
900
#244366
oklch(37.7% 0.071 252.7)
-
Step 950
950
#16283C
oklch(27.2% 0.044 252.1)
#366CA7 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #526FA9 | 0.032 |
| Deuteranopia (no green cones) | #4265A6 | 0.021 |
| Tritanopia (no blue cones) | #007A81 | 0.087 |
| Achromatopsia (no color) | #6A6A6A | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #366CA7
#366CA7
oklch(52.3% 0.11 252.4)
- #905E05
#905E05
oklch(52.4% 0.11 72.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #366CA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.017
- Flat Blue #3C73A8 ΔE 0.022
- Muted Blue #3B719F ΔE 0.022
- Mid Blue #276AB3 ΔE 0.024
- Ocean Blue #03719C ΔE 0.035
- Nice Blue #107AB0 ΔE 0.041
- Dull Blue #49759C ΔE 0.041
- Dusky Blue #475F94 ΔE 0.043
Use #366CA7 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.